MOORS Murders viewers were left feeling "disgusted" as new technology brought evil Ian Brady and Myra Hindley back from the dead.
The Channel 4 documentary gave viewers an in-depth view of the murders which took place near Manchester between 1963 and 1965.
The couple's first killing was in July 1963 when they slaughtered 16-year-old Pauline Reade .
In the documentary, journalist Clive Entwistle described how police arrested Hindley after discovering a suitcase that contained a tape recording of a child being tortured with her voice in the background.
The documentary also used CGI technology to make the couple's notorious mugshots blink and move - which many viewers found disturbing.
Alongside an emoji of an angry face, one person penned: "The CGI used to make Ian Brady and Myra Hindley's eyes move is utterly chilling."
Echoing their comments, someone else said: "Those animated mug shots with the blinking eyes are freaky."
While a third added: "I actually hate those moving mugshots. Scum of the earth - it's making my blood boil."
Segments from Hindley's unpublished diaries were read out in the documentary, which told a chilling tale of the pair's blood-thirsty ways.
Hindley was hired as Brady's secretary at Milward's Merchandise when she was 18 - and she soon fell for him.
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She documented the first time they met in one entry, where she wrote: "Ian wore a black shirt and looked smashing, I took him home and he was so gentle."
But in a separate entry, she wrote: "He's a crude, uncouth pig. He's cruel and selfish and I love him."
Moor Murders is available to watch on All 4 now.